Specify types of digital receipts

[msporny]

There are many types of digital receipts that a payment app (aka digital wallet) may store on behalf of the customer. Some of these include:

• transaction receipt (payment network has initiated payment)
• purchase receipt (list of items purchased and amount paid)
• consent receipt (I authorize you to use my information in these ways)
• warranty information (Vendor promises wrt. quality of goods delivered)

It is important the the WPIG document the differences between these types of digital receipts and ensures that it is possible to weave together the initiatives being spun out of the WPIG into a system that is capable of handling all of these types of receipts.

[msporny]

• [ ] Document these items in our terminology document.
• [ ] Find a CG or WG home for each type of receipt.